P2DE0Cold Start Fuel Injection Quantity C Lower Than Expected
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2DE0 is the cold-start shortfall for path C. Its partner P2DE1 is used by Honda, which treats it as a rich fault of its cold-start mixture control: that check compares the ratio the PCM commands just after a cold start with what the wide-band sensor measures. By the logic of the pair, P2DE0 would be the lean side, but no public Honda or other maker document covers P2DE0 itself. For petrol engines, CARB section 1968.2 (e)(11.1.3) requires cold-start faults to be stored apart from the same faults found later. Fuel shortfall when cold can stem from low fuel pressure, an air leak behind the airflow meter or injectors that atomise poorly; stalling or stumbling soon after starting is typical. P2DDC is the warm counterpart.
- What you may notice
- Check engine light on after a cold start
- Stalling or stumbling shortly after a cold start
- Long cranking when cold
- Likely causes
- PossibleFuel pressure too low at start (pump, regulator, check valve)
- PossibleUnmetered air entering behind the airflow meter
- PossibleInjectors of group C dirty, poor spray when cold
- RareCold-start calibration in engine control software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.